We've all been there—the fluttering in your stomach; the heightened heart rate; the thought that nothing has ever seemed so right. It's the perfect fit. A match made in heaven. And the significant other is the most amazing dress you've ever laid your eyes on.

But just as fashion lust can mirror that of, um, human desire, sometimes clothing is just as fickle. We've had our share of style heartbreak—a particularly painful saga involving a tiny Parisian boutique, a vintage Chanel coat, and a non-negotiable flight time comes to mind—and that's the theme of Moda Operandi's latest campaign with St. Regis Hotels & Resorts. Karlie Kloss, Poppy Delevingne, and Leandra Medine join a cast of other notables to share their own stories of "The One That Got Away," a series of anecdotes about vintage purses and runway looks that just slipped from their grasps. That's right—even the industry's most influential people occasionally get down on their luck, too.

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Watch the campaign teaser, below, and try not to get misty-eyed thinking of your own lost loves.